import socket
import datetime
s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
s.bind(('127.0.0.1',9999))
s.listen(1)
starttime = None
endtime = None
def Wait_connection():
    global starttime
    s.settimeout(None)
    conn,addr=s.accept()
    starttime = datetime.datetime.now()
    print('client addr',addr)
    client_msg=conn.recv(1024)
    print('client msg: %s' %(str(client_msg,'utf-8')))
    keep_alive()
def keep_alive():
    global endtime
    a = 1
    while a==1:
        try:
            s.settimeout(5)
            print('---------------------------------')
            conn,addr=s.accept()
            print('client addr',addr)
            client_msg=conn.recv(1024)#客户端发送过来的消息
            print('client msg: %s' %(str(client_msg,'utf-8')))
        except:
            a = 2
            endtime = datetime.datetime.now()
    print('连接已断开，本次连接持续 %s 秒'%str((endtime - starttime).seconds))
    Wait_connection()
if __name__ == '__main__':
    Wait_connection()